// Copyright (C) Kumo inc. and its affiliates.
// Author: Jeff.li lijippy@163.com
// All rights reserved.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
//


#include <pollux/functions/prestosql/aggregates/min_by_aggregate.h>
#include <pollux/functions/prestosql/aggregates/aggregate_names.h>
#include <pollux/functions/prestosql/aggregates/min_max_by_aggregate_base.h>

namespace kumo::pollux::aggregate::prestosql {
    template<typename V, typename C>
    class MinByNAggregate : public MinMaxByNAggregate<V, C, Less<V, C> > {
    public:
        explicit MinByNAggregate(TypePtr resultType)
            : MinMaxByNAggregate<V, C, Less<V, C> >(resultType) {
        }
    };

    template<typename C>
    class MinByNAggregate<ComplexType, C>
            : public MinMaxByNAggregate<
                ComplexType,
                C,
                Less<HashStringAllocator::Position, C> > {
    public:
        explicit MinByNAggregate(TypePtr resultType)
            : MinMaxByNAggregate<
                ComplexType,
                C,
                Less<HashStringAllocator::Position, C> >(resultType) {
        }
    };

    void registerMinByAggregates(
        const std::string &prefix,
        bool withCompanionFunctions,
        bool overwrite) {
        registerMinMaxBy<
            functions::aggregate::MinMaxByAggregateBase,
            false,
            MinByNAggregate>(prefix + kMinBy, withCompanionFunctions, overwrite);
    }
} // namespace kumo::pollux::aggregate::prestosql
